1416 results about "Throttle opening" patented technology

A continuously variable transmission is mounted on a vehicle capable of selecting plural drive modes and changes a target engine speed between drive modes. A pulley ratio is controlled by a motor. An ECU for transmission control includes a calculation section which outputs a target engine speed as a function of throttle opening and vehicle speed, and a motor control value determination section which outputs a control value for controlling the motor based on the target engine speed and an actual engine speed. In a case where, when a drive mode is selected, the current target engine speed changes by an amount exceeding a predetermined judgment value according to vehicle speed, the motor control value determination section updates the current target engine speed in a stepwise manner. The resulting configuration reduces a shift shock caused by a drive mode change.

In an internal combustion engine equipped with an injector for oylinder-inside injection to inject fuel into a cylinder and an injector for intake port injection to inject fuel into an intake port, both the injectors being switched for use depending upon operating conditions, wherein when an operating condition range using either one of the first or the second injector is switched to an operating condition range using the other one thereof, the amount of fuel to be injected by the either one of the first or the second injector is gradually decreased and the amount of fuel to be injected by the other one is gradually increased over a predetermined period during the switching. Further, at the time of the switching, at least one of ignition timing and throttle opening angle is gradually varied.

The invention relates to a regenerative braking control method of an electric car and a device thereof, which are characterized in that a throttle signal, a braking signal, the current speed of the car and the SOC (state of charge) value of a battery are acquired during the running process of the car, when the current speed of the car is larger than the preset minimum feedback speed of the car, and the throttle opening is smaller than the preset feedback threshold value or the braking signal, the feedback moment is calculated according to the current speed and the braking depth; when the SOC value of the battery is smaller than the preset upper limit, the feedback moment is output to charge the battery pack; and when the SOC value of the battery reaches the preset upper limit, an electricmachine controller controls an electric machine not to generate braking feedback charge current, and braking is carried out according to the traditional braking method. The method and the device can increase the utilization rate of battery energy, the car can be kept smooth during the travelling, the regenerative braking can be also realized, and in addition, the SOC value of the battery can be real-timely monitored, too, so the battery is prevented from being damaged when the battery is over charged downhill.

The invention discloses an intensive learning based urban intersection passing method for a driverless vehicle. The method includes a step 1 of collecting vehicle continuous running state informationand position information through a photographing method, the vehicle continuous running state information and position information including speed, lateral speed and acceleration value, longitudinal speed and acceleration value, traveling track curvature value, accelerator opening degree and brake pedal pressure; a second step of obtaining characteristic motion track and the velocity quantity of actual data through clustering; a step 3 of processing original data by an exponential weighting moving average method; a step 4 of realizing the interaction passing method by utilizing an NQL algorithm. The NQL algorithm of the invention is obviously superior to a Q learning algorithm in learning ability when handling complex intersection scenes and a better training effect can be achieved in shorter training time with less training data.

A storage unit provided in an engine control device stores three kinds of mode maps having different engine output characteristics. One of the mode maps is selected in accordance with the driving conditions, and a target torque is set by referring to the selected mode map using an engine speed and an accelerator opening-degree as parameters. A throttle opening-degree signal corresponding to the target torque is output to a throttle actuator, and an operation of opening or closing the throttle valve is performed in response to the throttle opening-degree signal.

The invention relates to a trajectory tracking control method and a control device for a driverless vehicle. The control method comprises that error of present driving trajectory and a reference trajectory of a vehicle is calculated by a data preprocessor, a target performance indicator function which is corresponding to the present driving model is obtained simultaneously; an upper layer controller predicts driving states of the vehicle over a period of time through a vehicle dynamics model; transition switch is conducted to function parameters according to switching control algorithm, and a performance indicator function at present sampling time is obtained; optimal controlled quantity of present time is calculated by considering performance requirement constraint conditions at the same time according to predicted driving states and the performance indicator function; a lower layer controller calculates throttle opening, braking pedal pressure and steering wheel turning angle according to the optimal controlled quantity; and the control device comprises the data preprocessor, the upper layer controller and the lower layer controller. Compared with the prior art, the trajectory tracking control method and the control device for the driverless vehicle have the advantages of being good in control effect, high in practicability, capable of improving stability and safety of vehicles and the like.

The invention provides a hydraulic chassis engineering machine step control method, which includes testing the current load state of the engineering machine, the opening degree of the throttle, and the actual run speed. The invention judges the current load state, when the load state is intermediate low, and the difference of the actual speed and the goal rotate speed exceeds the preset range, then corresponding current can be provided for the hydraulic motor for regulating the displacement; namely when the actual rotate speed is lower than the goal rotate speed, current for lowering the displacement can be provided to the hydraulic motor; when the actual rotate speed is higher than the goal rotate speed, the current for improving the displacement can be provided to the hydraulic motor; when the load state is in overload, the displacement of the hydraulic motor can be adjusted to the maximum. The required power of the system can be calculated according to the current displacement of the hydraulic motor, the demand of the rotate speed, and the current pressure of the system. Current, the displacement of which can meet the requirement of the controller, is provided for the hydraulic pump according to the required power of the system, and the needed displacement can ensure that the power absorbed by the hydraulic pump can meet the requirement of the hydraulic motor. Compared with the prior art, the invention can enable the engineering machine to realize the control requirement accurately.

Provided is a control device for an internal combustion engine, which is provided to allow a throttle opening degree to be controlled in accordance with a target engine intake air flow quantity even during transitional operation. The actual cylinder intake air flow quantity calculating unit (21) calculates a response delay model for an intake system from a volumetric efficiency equivalent value (Kv) calculated from a rotational speed (Ne) of an engine (1) and an intake manifold pressure (Pim), an intake pipe volume (Vs), and a displacement (Vc) of each of cylinders (2), and calculates an actual cylinder intake air amount (Qcr) from an actual engine intake air amount (Qar) obtained from an air flow sensor (4) and the response delay model. The intake air flow quantity controlling unit (24) controls the throttle opening degree (TP) in accordance with the target engine intake air amount (Qat).

The invention discloses a method and a device for sound simulation and sound production of an electric vehicle. The method includes sound mode selection, real-time vehicle information acquisition, signal processing of a control unit and sound file play. The control unit is connected with a signal acquisition unit, a sound mode selection switch and an in-vehicle sound player; the control unit is used for receiving signals of a rotational speed sensor, a throttle sensor and a vehicle speed sensor, and selecting a signal transmitted from a movement mode switch or a comfort mode according to a driver and passengers to control the in-vehicle sound player so as to enable the in-vehicle sound player to produce sound. By the method and the device, driving sound of a motorized vehicle under the same state can be simulated accurately, sound types are selected individually, and the problems of low noise in the vehicle, single sound and unpleasant driving feeling of the electric vehicle are solved.

The invention discloses a throttle opening degree control method for a varied-frequency air-conditioner. The method comprises the following steps of: S1) making an electronic expansion valve standby at the opening degree of P0; S2) determining a frequency band Fn of a compressor frequency value according to the compressor frequency value and a corresponding initial target opening degree Pn; adjusting the opening degree of the electronic expansion valve to be Pn; if the frequency of a compressor is increased, adjusting the opening degree of the electronic expansion valve to be the initial target opening degree corresponding to a real-time frequency; and if the frequency of the compressor is reduced, adjusting the opening degree of the electronic expansion valve to be the initial target opening degree corresponding to the real-time frequency after a delay of 60 seconds; and S3) after the electronic expansion valve is operated for t minutes at the opening degree of Pn, modifying the opening degree of the electronic expansion valve every other m seconds. By the method, the optimum efficiency of the operation of a refrigeration system can be ensured at various frequencies and under various working conditions.

An engine sound synthesizer includes an engine sound storing section, and a synthetic engine sound data generating section which generates synthetic engine sound data on the basis of engine sound data stored in the engine sound storing section. The engine sound storing section stores therein plural groups of plural entities of engine sound data recorded in different driving states, the plural groups of plural engine sound data entities being stored therein in correspondence with predetermined plural driving state ranges. The synthetic engine sound data generating section generates the synthetic engine sound data by selectively reading out of the engine sound storing section plural engine sound data entities in a group corresponding to one of the driving state ranges specified by externally input driving state specification information and selectively combining the read engine sound data entities. The driving states are each defined, for example, by a throttle opening degree and an engine rotation speed.

In throttle control, a throttle opening is set with sufficient control accuracy in accordance with the operating state of an engine despite variations in a throttle body and various kinds of sensors. A target effective opening area is calculated from a target amount of intake air, an atmospheric pressure, an intake pipe internal pressure and an intake air temperature by using a flow rate formula for a throttle type flow meter. A target throttle opening is calculated from a correlation map. An actual effective opening area is calculated from the amount of intake air, the atmospheric pressure, the intake pipe internal pressure, and the intake air temperature by using the above-mentioned flow rate formula, and a learning throttle opening is calculated from the correlation map. The target throttle opening is corrected by a throttle opening learning value calculated from a deviation between the target throttle opening and the learning throttle opening.

A vehicle engine is coupled to a driving system that includes a torque converter and an automatic transmission. An ECU sets a target value of an opening degree of a throttle valve based on a depression degree of an acceleration pedal. The ECU changes the throttle opening degree at a predetermined gradual change speed such that the throttle opening degree reaches the set target value. The ECU limits the gradual change speed of the throttle opening degree for a predetermined period such that a changing speed of the engine speed is suppressed at a reverse time when a direction of torque transmitted between the driving system and the engine is reversed. As a result, shock produced when the direction of torque between the driving system and the engine is switched is suppressed.

A control method can be provided for a watercraft that has three or more outboard motors mounted thereon side by side with each other. Two control levers which are primarily provided for shift and throttle controls of respective two of the outboard motors located on the outer-most sides make shift and throttle controls of all the outboard motors. A control range of the respective control levers includes a forward range, a reverse range and a neutral range between the forward and reverse ranges. The method can include, when both of the control levers are placed at a preset position in the respective neutral ranges, setting a shift position of an outboard motor located between the outer-most sides at a forward position or a reverse position, and setting a throttle opening of the outboard motor at a preset opening.

In executing an ETC cooperative downshift operation based on a driver's intent to decelerate, this system executes an engine output increasing control (e.g. a combination of a throttle opening control and a fuel injection restoring control) for increasing the engine output irrespective of driver's accelerator operation. At the timing a reduction amount in an input shaft rotational speed Nt exceeds a predetermined value K after the ETC cooperative downshift control is started, it is presumed that the hydraulic pressure of a to-be-disengaged clutch is already reduced to a hydraulic pressure level equivalent to a predetermined transmission torque capacity that causes no undesirable acceleration or shock even if the engine output increasing control is started. And, under such assumption, the engine output increasing control is started at this timing. Accordingly, the present invention can accurately set the start timing of the engine output increasing control so as to suppress any undesirable acceleration or shock caused by the engine output increasing control.

Provided is a control device for an internal combustion engine, which is provided to allow a throttle opening degree to be controlled in accordance with a target engine intake air flow quantity even during transitional operation. The actual cylinder intake air flow quantity calculating unit (21) calculates a response delay model for an intake system from a volumetric efficiency equivalent value (Kv) calculated from a rotational speed (Ne) of an engine (1) and an intake manifold pressure (Pim), an intake pipe volume (Vs), and a displacement (Vc) of each of cylinders (2), and calculates an actual cylinder intake air amount (Qcr) from an actual engine intake air amount (Qar) obtained from an air flow sensor (4) and the response delay model. The intake air flow quantity controlling unit (24) controls the throttle opening degree (TP) in accordance with the target engine intake air amount (Qat).

An impact absorber for decelerating a vehicle during a collision with an obstacle by hydraulic damping forces and pneumatic spring forces includes two tubes that are telescopically displaceable one inside the other. An internal tube of the two tubes is closed off to the outside by a base. A gas space subjected to high pressure is disposed adjacent said base and interacts with a first liquid space via a separating piston which is axially guided in the internal tube in a sealed manner. The first liquid space is hydraulically connected to a second liquid space via a throttle opening through an intermediate wall attached inside the internal tube. A working piston attached to a piston rod is guided in the internal tube in a sealing manner and interacts via the piston rod with a third liquid space in an external one of the two tubes. A control which can be connected to two chambers is provided to extend the impact absorber or to return it to a normal position.

The invention discloses a cruise control method and system of an automobile. Through a cruise control torque requirement calculation module in the cruise control system is used for receiving an engine rotation speed signal and a current cruise target speed input by a driver, a gearbox control module is used for obtaining a current cruise target speed signal and a current simulation accelerator opening signal to execute corresponding clutch control and gear control, and finally a system torque coordination module is used for controlling an engine ignition angle and a throttle opening degree to obtain current required torque, so that in the cruise control process, the automobile achieves downshifting fast acceleration or downshifting fast deceleration. According to the cruise control method, an automatic gearbox control unit and an engine controller are effectively combined, the problem that in the prior art, in the cruise control process, the automobile can not achieve fast acceleration and fast deceleration is solved, the automobile can make a faster response when encountering risks in the cruise control process, and the driving safety of the automobile in the cruise control process is further improved.

An engine control apparatus of the present invention sets a target torque τe, when the save mode m2 is set as an engine mode, according to the formula:τe←TRQ2*RATIO1+TRQ3*(1−RATIO1)Basic target torque TRQ2 and TRQ3 are set based on the engine speed Ne and the throttle opening-degree θacc and with reference to the normal mode map Mp1 and the power mode map Mp3 respectively. The correction factor RATIO1 is an addition rate which is set based on an accelerator opening-degree θacc and a vehicle speed V and with reference to a correction factor map Mr1. The correction factor map Mr1 stores a correction factor RATIO1 near 0 (although 1>RATIO1>0) when the vehicle speed V is low and the accelerator opening-degree θacc is high.

In an ejector cycle system, a variable throttle is disposed at an upstream side of an ejector. When high-pressure side refrigerant pressure in the ejector cycle system is approximately equal to or higher than critical pressure of the refrigerant, the variable throttle is fully opened. When the high-pressure side refrigerant pressure is approximately lower than the critical pressure of the refrigerant, a throttle open degree of the variable throttle is reduced from the fully open degree so that high-pressure side refrigerant is decompressed in two steps of the variable throttle and the ejector. Accordingly, in both cases of a high heat load and a low heat load of the ejector cycle system, COP of the ejector cycle system can be improved.

Systems and methods for controlling regeneration of a particulate filter downstream of an engine in a vehicle are provided herein. One exemplary method includes, during an engine shutdown, increasing a throttle opening and regenerating a particulate filter downstream of a three-way catalyst. The method also includes, during an engine start following an engine shutdown, setting one or more engine parameters based on whether the particulate filter was regenerated during a last engine shutdown before the engine start.

Methods and systems are provided for estimating a PCV flow to an engine based on the output of an exhaust gas oxygen sensor. During DFSO conditions, a reference voltage of the sensor is modulated initially with an intake throttle open and then with the intake throttle closed. PCV flow leaking past the piston valves in an aging engine, as well as an ambient humidity estimate, are inferred based on the outputs of the sensor during the modulating with the intake throttle open and closed.

Provided is a speed limiter, wherein a vehicle speed is detected, and a speed limit displayed on a speed sign is detected based on an image captured by a front monitoring camera. A speed difference between the vehicle speed and the speed limit is calculated, and an accelerator sensitivity gain is set using the speed difference as a parameter. Then an accelerator opening degree is corrected with the accelerator sensitivity gain to obtain a pseudo accelerator opening degree. A target throttle opening degree is set based on the pseudo accelerator opening degree and an engine rpm.

In a control device of a hybrid vehicle provided with an engine and a propulsion motor, at least one of which is used for driving the hybrid vehicle and a high voltage battery which power is charged and discharged by driving or regeneration operation of a propulsion motor, the control device comprises a throttle opening control device which controls an opening of a throttle depending on an accelerator pedal operating amount, and when the current driving speed of the vehicle at zero, and either the temperature of the high voltage battery is lower than a specified value, or the internal resistance of the high voltage battery is greater than a specified value, or an increase in a rotation speed of the propulsion motor or the rotation speed of the engine 3 is greater than a specified value, or a change amount of the input / output power voltage of the high voltage battery is greater than a specified value, or a change amount of the accelerator pedal operating amount is greater than a specified value, delays the response characteristic of the throttle opening with respect to the accelerator pedal operating amount more than for a standard control, and also performs control in which the upper limit value thereof is limited.

A target throttle opening degree computing device of a control apparatus computes a target throttle opening degree of a throttle valve and includes a phase lead compensator. A filter filters the target throttle opening degree to provide an ultimate target throttle opening degree, which is used to drive a drive motor to adjust an opening degree of the throttle valve.

The invention provides an automatic driving control method and system for performance testing of an electric vehicle. The method comprises: setting a correspondence table of accelerator opening degrees and voltages, a correspondence table of brake pedal positions and voltages, and a correspondence table of gears and logic signals; acquiring a driving working condition curve and determining a vehicle speed, an acceleration speed, an accelerator opening degree, and a braking opening degree of vehicle driving based on the working condition cure so as to form an automatic driving logic table; sending an accelerator opening degree signal, a braking pedal position signal, and a gear signal to a vehicle control simulation module by an upper computer based on the automatic driving logic table; andon the basis of the accelerator opening degree signal, the braking pedal position signal, the gear signal, and the braking pedal position signals, carrying out simulation by the a vehicle control simulation module to obtain a vehicle accelerator opening voltage signal, a braking pedal position voltage signal and a gear logic signal, thereby controlling vehicle running. Therefore, the e accuracy and intelligence of the vehicle performance test are improved.

In an outboard motor control system equipped with an electric throttle motor for moving the throttle valve of the engine mounted on the outboard motor, an electric shift motor for operating the shift mechanism to establish one from the in-gear, neutral and reverse shift positions, and a low-speed cruising switch for inputting the instruction to implement a low-speed cruising for causing the boat to cruise at a low speed, when the instruction is inputted, a throttle control is effected by controlling the operation of the motor to a set throttle opening and shift control is effected by controlling the operation of the motor to establish the in-gear position and neutral position alternatively, thereby enabling to cruise over a wide range of speeds including very slow, without requiring troublesome manual operations.

In a control device of a hybrid vehicle provided with an engine and a propulsion motor, at least one of which is used for driving the hybrid vehicle and a high voltage battery which power is charged and discharged by driving or regeneration operation of a propulsion motor, the control device comprises a throttle opening control device which controls an opening of a throttle depending on an accelerator pedal operating amount, and when the current driving speed of the vehicle at zero, and either the temperature of the high voltage battery is lower than a specified value, or the internal resistance of the high voltage battery is greater than a specified value, or an increase in a rotation speed of the propulsion motor or the rotation speed of the engine 3 is greater than a specified value, or a change amount of the input / output power voltage of the high voltage battery is greater than a specified value, or a change amount of the accelerator pedal operating amount is greater than a specified value, delays the response characteristic of the throttle opening with respect to the accelerator pedal operating amount more than for a standard control, and also performs control in which the upper limit value thereof is limited.